Photographic apparatus



6. WALD.

PHOTOGRAPHIC APPARATUS.

, APPLICATION FILED net. 10, 1919.

Patented Jan. 31, 1922.

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PHOTOGRAPHIC APPARATUS.

APPLICATION FILED on. 10. 1919.

Patentgd Jan. 31, 1922.

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fzzzfezzzfar UNITED STATES PATENT OFFICE.

GEORGE wALnor wAsn nGron, msrmcr or COLUMBIA.

PHOTOGRAPHIC APPARATUS.

invented certain new and useful Improve ments in Photographic Apparatus, of which the following is a specification;

The object of my invention is to enable an operator to expose, print and develop photographs in day light without" the use of a dark room.

Referring to the drawings which illustrate the devices used to accomplish the above results. a

Figure 1 is a cross sectional side view of the device;

Figure 2 is a top view of the exposing box, with all of top cover removed except that part holding'the glass through which the light passes; 7

Figures 3, 1 and 5 show the devices used to engage and disengage the friction cones;

Figures 6, 7 and 8 illustrate the methods used in adjusting the-exposing space to correspond to the strengths of lights;

Figure 9 shows a split-ring Figure 10 shows a film after being developed; and

Figure 11 shows a strip of paper simi lar to film 10 on which the photograph is printed by exposure to light j 1 Similar parts are designated by similar numbers.

7 rolled in the market.

The operation of my invention is as fol lows:

The film or negative after being developed is in one strip, at each end of which is pasted on two strips of paper four or five feet long and of the same width as the film. This film (Fig. 10) is'wound up on the same spool on which the filmsare generally A similar strip of paper, Fig. 11, of corresponding length and width as the is to be made with the center'part (somewhat longerthan the film proper) properly sensitized, is wound upon a similar spool. The end of the paper strip is to be red so as t preventlight rays penetrating the sensitized paper beneath. Both spools are secured in place in a light-tight box so as to allow the rotation of same. Both ends of these strips (film and printing paper) are secured on a third spool on which they are wound up while exposed to light. After the paper and film receive the light exposure, the light rays are shut off glass 2 Specification of Letters Patent. Patented J an 31 1922 Application filed October 10, 1919. Serial No. 329,842.

and the strips returned and again wound on their respective spools. The box is then opened, the exposed paper removed as it is wound on the spool and then developed.

' I will now explain fully my apparatus for printing photographs in day light. 3 Referring to Figure l, 1 is a box in the top 1 s an opening in which the ground is secured by a metal frame 3. The box 1 has a light-tight partition in it 1". Between 1 and 1 (see Fig. 2) are secured two partitions 4i and 5, sloping downwards (see Fig.1), both terminating in rollers which are in contact with the spring-metal surface 6 which is in turn secured to the legs or holders 7 secured to the bottom 1 of the box 1. The bottom 1 is opened and with it 7 and 6 are removed from the rollers 10, 10, and the rollers eland 5" in 4 and 5. a The bottom is'now pulled outwards and the spool 9 on which is wound the photographic paper 8 is inserted between the two friction points of shafts 12 and 13. The bottom 11 ispushed back in until the friction points engage the hole in the spool so as to allow the spool 9 to rotate when the paper 8 is pulled. The

shaft 12 is held in place by the slots or depressions 14 grasped in the spring ring 15 (shown in Fig. 9), which inturn is held in the pressed steel holder 16, againstthe wall 11. A number of slots 14: are provided in the shaft 12 soas to allow any width of paper and spool corresponding to any standard film size to be used. The slot in the wood body of the commercial spool used, engages the shoulders 17 of piece 18 against which i the wheel of the spool 9 rests, in such a manner that the shaft 13 rotates with the spool 9 while shaft 12 remains standing still. The cone 19 which is mounted on the shaft 13 and rotating when the latter rotates, is normally not engaged and therefore free to rotate. Suflicient of the paper strip 8 is pulled off to reach the spool 20, which paper is temporarily bent toward the hinge 21 while the bottom 1 is open. The spool 22 is held by a similar arrangement to that'of spool 9. It holds the film 23 (see Fig. 10). The paper ends of both film 23 and paper 8 are pushed throughthe slot 24 in thespool 20, (see Fig. 1). Thespool 20 is secured solidly to shaft 25 which is turned by crank and handle 26 andl27, respectively. The handle 27 is now turned a turn or two, thus securing tightly the end papers of film 23 and sensitized paper 8 on the spool 20. Thebottom 1 is now closed and held tight by catch 29 on pin 30. V7 The angular seam between box 1 and bottom 1 prevents the raysoflight from entering the box 1, more soas the weight of the box 1 rests on the bottom 1 The handle 27 1s now rotated with a fairconstant speedtill the entirefilmand papers-rolls are wound up on the spool 20. The end 31'0f fihn 23 and end 32 (right-hand side Figill) of paper 8 are secured to their respective spools '22 and any a pester so-as not to make it necessary at this time to r'eopenthe" box In order to,

f attain ajconstantjspe'ed of spool 20 while same" is: rotated by handle 27,a fly-wheel 33 is mountedbn-a shaft 34 on which latter is] also-mounted a large gearwheel 35 in mesh with a small gear wheel 36niounted in turn on shaft 25' Thus with a fairly constant ro-.

' tation' of crankhandle 27, a constant speed of the spool 20-will be maintained. The body 7 of thespool 20'is of large diameter so that the increase in the latter diameter willnot "cause much difference in the speed of the film 23and paper 8, while same are passing by the opening 37. The light rays passing through the window 2 and through the film, action thecheinicals of the sensitized paper 8. Both film 23 and paper 8 are held tight together by the pull of same while winding 011 spool' 20 and by the rollers 4 and 5 in" partitions 4, '5"and;10-1 0 against the smooth sur- 'faceofthe spring plate 6. In order to provide 'forbright and dark days a-hinged partition 38 is hinged at 41 extending the entire width between wall 12' and l The end of 38' has secured toit a stiff cloth edging 40.

This partition 38 swinging on its point 41 away from 4 will, increase the opening 37 until'the maximum "point is reached, beyond which the cloth 140 will rise from the film L surface on'spring plate;6. If 38is swung eluding all light'fromthe' film 23. and paper '8. The ends'of 38 against 1 and 1 can'also: .be fixed with cloth edging like that 0f-40 in the opposite direction toward the partition 4 the cloth 40 will touch partition 5 and so as to allow'38 to. swing easily between pushed away i from same.

walls 1 and [1, andstill be light-tight.

- Normally fiat spring '39 pushes 38 away from 4', Rod v42 ispivoted at one endto 38' and the other end to shaft 43 through'link connection j- 44. Shafts-43' is supported in bracket- 45 secured to ,4 and in'the walls 1 andflf. Shaft 43 may either be. a solid piece 'withshaft 46 or for ease in vconstruction, .46 may terminate, in a sleeve and slot arrangement 47 engaginjgpin 48 secured in v shaft' 43 {(see Figs. 6, 7 and18). As knob 49;is rotated, 381is pulled toward 4or "is On shaft 46 is V mounted a ring washer 50 terminating in a-sleeve in which a pin 51 is held against a spring The other endgof5l has a roller 52 held against the half ring washer 53 by notches or depressions (see Fig.6). This arrangement permits hinged partition 38 to be held in formsin four positions, viz., R, B,YF, and D, Fig. 7. The position of Fig. 1

being B or bright li fair 1i ht position and From tion shown in Fig. '1 to a point rightiup against 4. p i

It is absolutely necessary'that the, light rays be shut off from the "sensitive paper 8 t, ,F indicates the the dark position.

when same is rewoun'don-itsrspool 9,; To

accomplish this the shaft46 is turned by knob 49 to the position Rfwhen the light on which is mount- 'to-D, 38 wouldmove from the posishape asshown in Figs, 3 andz4 liavijnga slot 62 is slidably mounted on shaft 57 between piece 60 and cone 64.' The rod 61 ends in a wedge like end 63 so that when the latter is pulled in between 60 and64, the cone 64 is pushed against spring 65 and causes 64 1 to engage frictionally cones l9 and 56. i The spring 65 is held against washer 66 secured by apin to shaft 57; The cone 64 is slidably mounted on the shaft 57 butthrough'a' key and slot arrangement is made to revolve with shaft 57. The rod 61 (see Fig. 2) ispivoted to link 67, the latter-in turn secured to shaft "46'. As the'knob 49 is turned from B to D the rod'61 slides between 60 and 64 on the flat portionthereof (right-hand "side Figs. 3

and 4) However, if the position R is reached the Wedge shape 63 is pulled between 60 and 64 and the cone 64 engages l9 and56, J

thus thefihn 23 and paper 8 can be rewound 1 on their respective spools 22 and 9, 58 and 59.

"At this time, however, the opening. 37 is closed light'-tig'"ht.' The positions R, B, F and D shown in Fig. 7 are marked on either the wall 1' or on the cover 68 covering the devices shown in Fig. 6. A pointer 69' secured to shaft 46 indicating the )roper position of 38; fThe sensitized part,- P, of the paper 8 is tojbe 'longerjthan the film part PP, of the film strip 23 so as to ensure proper action;

End 32 (left hand sideFig. 11), of paper 8 must be of a non-actinic color so as to prevent light rays penetrating SP.

Commercially the ends 31 can, be wound on top of the spool 'containingpaper 8 and. fixed with glue to be pasted to film 23.

Iclaim: 1. A photographic printing'apparatus including a light tight casing having an open ing, a film negative supplyroll, a sensitized paperrsupply roll, a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, and a transversely arranged shutter for admitting light to the interior of said apparatus through the aforesaid opening during passage of negative and paper strips from said supply to said take up ro s.

2. A photographic printing apparatus including a light tight casing having an opening, a film negative supply roll, a sensitized paper supply roll, a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, and a transversely arranged adjustable shutter for admitting a light'streak of variable widths to the interior of said apparatus through the aforesaid opening and during passage of negative and paper strips from said supply to said take up rolls.

3. A photographic printing apparatus including a light tight casing having an opening, a film negative supply roll, a sensitized paper supply roll, a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, a downwardly converging light duct communicating with the aforesaid opening and leading into the apparatus, and a movable shutter for admit, ting light to the interior of said apparatus through the aforesaid opening during the passage of the negative and paper strips from said supply rolls to saidtake up roll.

4. A photographic printing apparatus including a light tight casing having an opening, a film negative supply roll, .a sensitized paper supply roll, a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, a transversely arranged adjustable shutter for admitting light streaks of variable widths to interior of the apparatus, and means for actuating.

said shutter.

5. In photographic printing apparatus including a light tight casing having an opening, with a film negative supply roll, a sensitized paper supply roll, a take up roll common to both of the rolls aforesaid, means for.

rotating the said take up; roll, a transversely arranged adjustable shutter for admitting light streaks of variable widths to interior of the apparatus through the aforesaid opening, and graduated means for actuating said shutter from the'exterior of the apparatus. g f a 6. A photographic printing apparatus including a light tight casing having an opening, a film negative supply roll, a sensitized paper supply roll, a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, a balance wheel operatively connected with a shaft carryingsaid take up roll, and a transversely arranged adjustable shutter for admitting light through the aforesaid opening to the interior of the apparatus in varying degrees of intensity.

7. A photographic printing apparatus including a light tight casing having an opening, a film negative supply roll, a sensitized paper supply roll, .a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, a transversely arranged adjustable shutter for admitting light to the interior of the apparatus through the aforesaid opening in varying degrees of intensity, means for actuating said shutter from tie exterior of the apparatus, and means for automatically retaining the shutter in its adjusted positions.

8. A photographic printing apparatus including a light tight casing having an opening therein, a shutter for said opening, a film negative supply roll, a sensitized paper supply roll, a take up roll common to both of the rolls aforesaid, means for rotating the said take up roll, and means for simultaneously rewinding said supply rolls including a driven gear on each roll-support ing shaft, an intermediate driving gear nor mally out of engagement but adapted to engage the aforesaid gears when occasion requires, and a crank for rotating said driving gear during the rewinding operation.

9. A photographic printing apparatus including a light tight casing having an opening, a film negative supply roll, a sensitized paper supply roll, a take up roll common to 7 both of the rolls aforesaid, means for rotating the said take up roll, and means for re winding said supply rolls and means operated by the said rewinding means for covering the aforesaid opening for automatically excluding light from the interior of the apparatus during the rewinding operation.

In testimony whereof I afiix my signature.

GEORGE WALD. 

